For folks who have a fuzzy memory, we’re here to help you out. In the case of Wilden’s murder, Cece Drake aka Charlotte DiLaurentis is responsible. And Season 6, Episode 10 — titled “Game Over, Charles" — explains it all.

In the episode, Charlotte schemes to get Alison at the Rosewood High School’s senior prom alone. Her goal is to talk with Alison about her past and why things panned out the way they did. And of course, all roads lead back to Radley Sanitarium.

Once Aria, Spencer, Emily, Hanna, Mona, and the guys realize that Alison attended the prom they were all forbidden to go to, they set out to find Alison, but are too late. Charlotte has already taken Alison to Radley and is seemingly holding her hostage.

The rest of the girls head to the Carassimi Group, in hopes of finding Alison. After all, Charlotte has been sending Alison a slew of text messages from servers located at the company building, which they learned from Mona.

Once the group arrives at the Carassimi Group, they enter a room where they see a hologram of Alison trapped at Radley with Charlotte pulling the strings. Charlotte begins to explain why she tormented the girls over the years, which was due to her feeling that they stole Alison away from her.

Charlotte explained her unknown history as a member of the DiLaurentis family. Apparently, Jessica went as far as visiting Charlotte in secret at Radley, after an unfortunate incident with Charlotte almost drowning baby Alison in the bathtub.

After Charlotte revealed her sketchy and unfortunate past, she took responsibility for killing Wilden. Charlotte explained that she had to kill Wilden since he found out that Alison was still alive and he didn’t want her telling anyone about their summer hookup that occurred before she “disappeared.” As a result, he threatened to hurt Alison, which left Charlotte with no choice but to eliminate him.